The figure given below shows the colour change in test tubes A,B and C when china rose indicator is added in them. The respective solutions in test tubes A, B and C are

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Sugar solution, Lime water, Baking powder

Lime water, Sugar solution, Lemon juice

Sugar solution, Lemon juice, Vinegar

Lemon juice, Sugar solution, Lime water

answer is B.

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Detailed Solution

Chaina rose is used as an indicator in an acid base titrations. In presence of acid

chaina rose appears in dark red or magenta colour but in presence of a base chaina rose appears

in green colour. In neutral solution there is no colour change in chaina rose.

Sugar solution $\to$ Neutral $\to$ Chaina rose remains same.

Lemon juice $\to$ Acidic $\to$ Chaina rose changes to magenta.

Lime water $\to$ Basic $\to$ Chaina rose changes to green.

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